Paper-cutting machine



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E. P. DONNE LI..-

-PAPBR CUTTING MACHINE.'

2 Sheets-Sheet 2.

15.290.004" Patented 1356.11.1883."

`tached.

- UNITED STATES PATENT ONICE.,

EDWARD I). DoNNELL, oE cIIIoAGo, ILLINoIs.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part of Letters :Patent No. 290,004, dated December 11, 1883.

Application filed YApi-i114, 1883. (No model.)

clamp and other points, which will be herein` after more fully describechand pointed out in the claims.

In order to enable others skilled in the art to which my invention relates to make and use the same, I will now proceed to describe its construction and operation, referring to the accompanying'drawings, in which-'- Figure lis a longitudinal vertical section of a paper-cutter having my improvement at- Fig. 2 is a front elevation, 'and Fig. 3 a rear elevation, of the upper part of the same.

A represents the frame ofthemachine, which is formed in the usual orany desired manner, and provided with the usual band-gage, u, two# parttable B B', and gearing C, for operating the knife either by hand or steam power. The knife-bar D operates in slots d in the end frames, as usual, and is given aV transverse motion through said frames by Ineans of the friction-rollers d', carried by the knife-bar and running in inclined slots 'e e in a casting or cross-bar, E, secured to the frame in front of the knife, thus greatly strengthening the knifebar where it is usually weakened by slottin'g to admit of rollers carried by the clamp, and also leaving the clamp perfectly free to rise and fall independent of the knife, as will be readily understood by reference to the drawings'.

The clamp F is also arranged to slide vertically in grooves f f in the side frames just in rear of the knife-bar D, and to the outer ends of this clamp are secured rods F', passing down through the table B', and carrying in theirlower end a shaft, G. This shaft is formed or provided at either end with a short arm, g, inclining backward and connected by a rod, G', with the main frame A, which connection turned, forces down the rods F' and clamp F.

The shaft G is also provided with a foot-treadle, A

g', upon its forward side and a short-weighted arm, g2, upon its rear side, as shown clearly by Fig. 1.

The upper part of the frame A is provided on its rear side with a projection or lug, a', to which is pivoted a cam bar or arm, H, formed with teeth h' upon kits upper end, and having its lower end adapted to rest upon the clamp, as shown in Fig. 3, in such a manner as to lock it in any position when down, and so hold the paper tightly clamped. The toothed segment h upon the upper end of this cam-bar H meshes with a segment-gear, t', upon the end of a shaft, i', journaled in the frame A, and provided with a hand-wheel or crank-handle, I, within easy reach of the operator, by means of whichthe bar H may be raised to allow the use of the clamp. It is obvious that the same result may be had by connecting the shaft t" directly to the clamp-bar and dispensing with the gear. y 1

The two parts B B' of the table are secured to the frame,with a slight space between them immediately below the knife, as usual; but this space, instead of being filled with wood,.as at present, Ileave entirely open, as shown in Fig. l, and to the forward edge ofthe rear portion, B', of this table I secure a steel bar, b, having its face and side slightly underbeveled, as represented, and so placed with reference to the 'knife that when the latter descends it will pass the cutting-edge of this bar, thus enabling the Inachi ne to make a much cleaner out of the paper, and preventing the trouble of frequently replacing the wooden cutting-block usually used at this point. The forward part, B, of the table is placed inV horizontal grooves in the side frame, and provided with a spring, b', adapted to retain it in position with its inner edge nearlyin contact with the cutting-edge b. YThis edge of the sliding table is also beveled t correspond with the bevel on the knife-blade, and by this arrangement the space between the two parts is reduced to the smallest practicable eX- tent, and the knife is free to push the part B aside as it descends. This also enables the table to be drawn back at any time to allow clippings to be dropped through beneath the machine. t

In operation the paper to be cut is placed IOO upon the tableB B in proper adjust-nient, and by means of the foottreadle and its toggle the clamp is drawn down tightly upon it and held in that position by the cam-bar, which follows the clamp and locks it by its own weight. rIlhe gearing C is then started, and the knife-bar drawn down, and it is at the same time given a transverse motion by the slots in the casting or cross-bar E, the knife-blade descending until it has shoved past the cutting-edge of the bar b. The hand-wheel I is then turned, throwing up the Cain-bar or loeking-arm II, and the clamp F is then thrown up by reason ol" the weighted arm g`-',which breaks the toggle f/ G, and lifts by the rods F'. It will thus be seen that when clamping the work both hands may be used in holding itin place, and when clamped it is automatically locked by thc cam, but is easily and quickly unlocked by means of the hand-wheel and segment.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a paper-cutter, the combination, with the elampbar, of a locking arm or cam falling behind the clamp as it is drawn down, and provided with means for unlocking it, when de sired, substantially as and for the purpose set forth.

2. In a paper-cutter, the combination, with the clamp-bar having rods extending downward through the frame, of a foot-treadle jou rnaled in the lower ,ends of this rod, and connected by a toggle to the main frame, and provided with a weighted arm adapted to break the toggle,whereby the clamp is drawn down by foot-power and thrown up automatically, as shown and described.

3. In a paper-cutter, the clamp F, in combination with the cam-bar or locking-arm I-I, adapted to fall by its own weight, and having segment h upon its upper end, the segment fi, shaft i', and hand-wheel I, substantially as described and shown.

et. In a paper-cutter, the clamp F, having rods F', in combination with the shaft G, having arms g, and togglc-connection G, foot-lever g', and weighted arm gg, all constructed and ar ranged to operate substantially as and for the purpose set forth.

5. In a paper-cutter, the clamp F, with its rods F', locking-cam II, havin g segment h, segment i, shaft t7, and hand-wheel I, in combination with the foot-treadlc G g, toggle 1/ G, and weighted arm r/Y, all constructed and arranged to operate substantially as and for the purpose set forth.

G. A paper-cutter consisting, essentially, of

the main frame A, two-part table B B', having a cutting edge or bar, b, the huile-actuating mechanism C, and knife-bar D, provided with rollers d', operating in inclined slots ce of the bar E, in combination with the vertically-slid ing clamp F, ha ving rods F, locking-arm II h, segment i, and hand-wheel I, i'oot-trcadle G g. weighted arm 'rj-,and toggle y G', all constructed and arranged to operate substantially as and for the purpose set fort-h.

In testimony whereof I affix my signature in presence ot' two witnesses.

EDWARD l?. DONNELL.

\Vitnesses:

RICHT). Nina l FRA NK J'onNsoN. 

